Pedipalps of spiders have the same segmentation as the legs, but the tarsus is undivided, and the pretarsus has no lateral claws. In sexually mature male spiders, the final segment of the pedipalp, the tarsus, develops into a complicated structure (sometimes called the palpal organ or bulb) that is used to transfer sperm to the female seminal receptacles during mating. The details of this structure vary considerably between different groups of spiders and are useful for identifying species.[1][2]

Pedipalps are sensitive chemical detectors and function as taste and smell organs, supplementing those on the legs. [3]

The cymbium is a spoon-shaped structure located at the end of the spider pedipalp that supports the palpal organ.[1] The cymbium may also be used as a stridulatory organ in spider courtship.[4]

Torre-Bueno, J. R. 1989. The Torre-Bueno Glossary of Entomology compiled by Stephen W. Nichols; including Supplement A by George S. Tulloch. Published by The New York Entomological Society in cooperation with the American Museum of Natural History. 840 pp.